Testing quasi-Dirac leptogenesis through neutrino oscillations
arXiv:2007.09158 · doi:10.1016/j.physletb.2021.136175
Abstract
The lightness of the Standard Model (SM) neutrinos could be understood if their masses were to be generated by new physics at a high scale, through the so-called seesaw mechanism involving heavy fermion singlets. If new physics violates baryon minus lepton number by only a small amount, the heavy fermion singlets as well as the SM neutrinos split into pairs of quasi-Dirac states. At the scale of the fermion singlets, this quasi-Diracness allows to enhance CP violation in their decays and the cosmic matter-antimatter asymmetry can be successfully generated through resonant leptogenesis. At lower scale, this quasi-Diracness results in small SM neutrino mass splitting which can be probed in oscillation experiments. Remarkably, the parameter space for viable leptogenesis spans over the regime relevant for solar and atmospheric neutrino oscillations.
arXiv comment14 pages, 1 figure, PLB version
References in corpus (27)
- A lower bound on the right-handed neutrino mass from leptogenesis
- Resonant Leptogenesis
- The Twin Higgs: Natural Electroweak Breaking from Mirror Symmetry
- Electroweak-Scale Resonant Leptogenesis
- The Sphaleron Rate in the Minimal Standard Model
- Flavour-Violating Charged Lepton Decays in Seesaw-Type Models
- Mirror World and its Cosmological Consequences
- Probing oscillations into sterile neutrinos with cosmology, astrophysics and experiments
- Pseudo-Dirac Neutrinos, a Challenge for Neutrino Telescopes
- Resonant τ-Leptogenesis with Observable Lepton Number Violation
- Discovery probability of next-generation neutrinoless double- decay experiments
- Leptogenesis in the Universe
- Pseudo-Dirac Neutrinos in the New Standard Model
- Same Sign versus Opposite Sign Dileptons as a Probe of Low Scale Seesaw Mechanisms
- Leptogenesis with TeV Scale Inverse Seesaw in SO(10)
- Is the Zee model neutrino mass matrix ruled out?
- Pseudo-Dirac Neutrino Scenario: Cosmic Neutrinos at Neutrino Telescopes
- Reconciling leptogenesis with observable mu --> e gamma rates
- Majorana vs Pseudo-Dirac Neutrinos at the ILC
- Zee Model Confronts SNO Data
- From Dirac neutrino masses to baryonic and dark matter asymmetries
- Pseudo-Dirac neutrinos via mirror-world and depletion of UHE neutrinos
- Quasi Dirac neutrino oscillations
- Viability of bi-maximal solution of the Zee mass matrix
- Quasi-Dirac neutrino oscillations at DUNE and JUNO
- A Model for Pseudo-Dirac Neutrinos: Leptogenesis and Ultra-High Energy Neutrinos
- CP Violating Effects in Heavy Neutrino Oscillations: Implications for Colliders and Leptogenesis